Embedded Firmware Engineer – Wireless & Sensors

Embedded Firmware Engineer – Wireless & Sensors Location: Hyderabad Experience: 4–6 years Job Overview We are looking for a skilled Embedded Firmware Engineer with strong experience in Bluetooth Low Energy (BLE) and embedded systems, along with a solid foundation in Digital Signal Processing (DSP) . The ideal candidate will work on high-performance, low-power wireless devices involving sensor data acquisition, real-time streaming, and advanced signal conditioning using filtering techniques. Key Responsibilities

• Design, develop, and maintain firmware for embedded systems with a focus on Bluetooth Low Energy (BLE) communication
• Work with Wi-Fi and other wireless technologies (optional but preferred)
• Interface and integrate sensors such as:
• Accelerometers
• Gyroscopes
• Other IMU / environmental sensors
• Implement Digital Signal Processing (DSP) techniques for real-time sensor data analysis
• Design and apply filtering techniques such as:
• Low-pass, high-pass, and band-pass filters
• Moving average and exponential smoothing filters
• Sensor fusion filters (e.g., complementary filters, basic Kalman filtering)
• Develop solutions for high-frequency data acquisition and streaming over BLE and/or Wi-Fi
• Implement and optimize mesh communication protocols
• Work extensively with Nordic Semiconductor (nRF) platforms , including:
• nRF5 SDK
• nRF Connect SDK (NCS)
• Design and optimize data storage systems using NOR Flash , ensuring efficient:
• Data logging
• Retrieval
• Wear leveling (if applicable)
• Optimize firmware for:
• Low power consumption
• Bluetooth range and reliability
• System performance and latency
• Debug, test, and validate firmware using standard tools (JTAG, RTT, logs, etc.)
• Collaborate with hardware, mobile, and backend teams for system integration Required Skills & Qualifications
• Strong experience in Embedded C/C++ programming
• Hands-on experience with BLE stack development and debugging
• Solid understanding of Digital Signal Processing (DSP) concepts, including:
• Sampling theory and aliasing
• Noise reduction techniques
• Time-domain and basic frequency-domain analysis
• Experience implementing filters on embedded systems for real-time data conditioning
• Experience working with sensor data acquisition and processing (IMU preferred)
• Solid understanding of:
• Real-time systems
• Interrupts, timers, and low-power modes
• Experience with nRF52/nRF54 series or similar MCUs
• Familiarity with high-throughput data transfer over BLE
• Experience with flash memory management
• Understanding of wireless communication fundamentals
• Experience in production-grade firmware development
• Familiarity with mobile app interaction (BLE central side) Preferred Qualifications
• Exposure to power profiling and optimization tools
• Experience with OTA (Over-the-Air) firmware updates
• Knowledge of RTOS (Zephyr preferred for NCS)
• Experience with sensor fusion algorithms (e.g., orientation estimation using IMU data)
• Experience implementing or working with BLE Mesh or other mesh protocols
• Experience with Wi-Fi-based embedded systems
• Experience in wearable devices / IoT products
• Familiarity with FFT or spectral analysis in embedded environments Soft Skills
• Strong analytical thinking, especially for signal interpretation and noise handling
• Strong problem-solving and debugging skills
• Ability to work independently and in cross-functional teams
• Good communication and documentation skills Cross-Functional Collaboration
• Work closely with hardware engineers to co-design power-efficient systems
• Align on RF performance tuning and BLE/Wi-Fi optimization
• Enable efficient sensor data pipelines and storage systems
• Jointly debug system-level issues across hardware and firmware